Introduction: While China has seen a significant decline of COVID-19 cases after making all-out efforts for more than two months, the world is currently facing an escalating urgency as the disease has broken out in multiple places and spread to more countries around the world. To increase understanding of China’s key measures for prevention and control of the COVID-19 in a comprehensive and objective manner, CIKD is compiling different Questions and Answers”. This Series focus on widely-discussed questions and aim to facilitate understanding of similarities and differences from a comparative perspective. It is important to note that the information provided in this Series is intended for your general knowledge only and is not a substitute for professional medical advice or treatment.